From c51147cf236c94fba76cf72bf1289af82b5eaaed Mon Sep 17 00:00:00 2001
From: Stefan Neis <Stefan.Neis@t-online.de>
Date: Thu, 15 Jun 2000 15:16:15 +0000
Subject: [PATCH] Avoid invalid update rectangles in
 wxGrid::BlockToDeviceRect(...)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7576 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/generic/grid.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/generic/grid.cpp b/src/generic/grid.cpp
index 0abf606854..2a1c2e2688 100644
--- a/src/generic/grid.cpp
+++ b/src/generic/grid.cpp
@@ -8036,6 +8036,9 @@ wxRect wxGrid::BlockToDeviceRect( const wxGridCellCoords &topLeft,
     int cw, ch;
     m_gridWin->GetClientSize( &cw, &ch );
 
+    if (right < 0 || bottom < 0 || left > cw || top > ch)
+        return wxRect( 0, 0, 0, 0);
+
     rect.SetLeft( wxMax(0, left) );
     rect.SetTop( wxMax(0, top) );
     rect.SetRight( wxMin(cw, right) );